Sealing band for film spools



July 20 1955 E. H. DUDEN 3,195,722

- SEALING BAND Fox FILM sPooLs y Filed Feb. 25,- 1963 l 9\ I0 INVENTOR Emanuel Huberfuden ATTORNEY United States Patent O 3,195,722 SEALING BAND FOR FILM SPLS Emanuel Hubert Duden, Mortsel-Antwerp, Belgium, as-

signor to Gevaert Photo-Producten NIV., Mortsel- Antwerp, Beigium, a Belgian company Filed Feb. 25, 1963, Ser. No. 260,914

Claims priority, application Belgium, Feb. 27, 1962,

41,426, Patent 614,427 4 Claims. (Cl. 20d-#53) This invention relates to means and to a method for sealing spools. More particularly it relates to a band and a method for the sealing of film spools.

In the known way substandard film spools are sealed by a strip of paper which is inserted with one end under the last winding of the substandard film and is then wound up together with the film. The other end of such a paper strip is provided with a small adhesive strip by means of which the end of the paper strip is attached to the back side of its preceding winding.

Such a sealing strip has a great disadvantage, viz. as its first mentioned end portion is freely inserted between the last winding or windings of the substandard film, it is not possible to pull the last windings and the sealing strip for fastening these windings firmly.

The object of the present invention is to provide a sealing band for film spools which can be iitted in a very simple way and which allows the last windings of the film to be well tightened.

Another object of the present invention is to provide a sealing band which is not only appropriate for sealing film spools, but which can also be used for sealing other spools, such as spools for magnetic tape, spools for plastic webs and the like.

A further object is to provide a sealing band for spools which can be used more than once.

Still another object consists in providing a sealing band for spools which can be manufactured in a very simple way, preferably automatically.

A still further object of the present invention is to provide a sealing band thus designed to prevent that the adhesive substance, pressed outwardly at the edges of the adhering places, would stick to the interior side of the spool flanges.

The sealing band for spools according to the present invention consists of a paper, plastic or metal.band provided near both its extremities with at least one opening, and two self-adhesive strips which are attached over these openings at the same side of the sealing band.

The method for sealing spools in using the abovementioned sealing band comprises: first sticking the sealing .band with one self-adhesive strip to the extrem-ity of the tape, tilrn, web or such like material which is wound on the spool, then tightening the last windings ot this material by means of the sealing band and winding up the sealing band on the spool, and finally sticking the other self-adhesive strip of the sealing band to the back side of the first self-adhesive strip.

The invention is hereinafter described by way of some examples.

FIG. 1 is a top view of a sealing band according to a first embodiment.

FIG. 2 is an enlarged longitudinal view of one extremity on the line Il-ll of FIG. l.

FIG. 3 is a perspective side-view of this sealing band.

FIG. 4 shows the way in which the sealing band is wound on the substandard tilm spool.

FIG. 5 shows a second embodiment of a sealing band according to the present invention.

In FIG. l the sealing fband 1 consists of a duplex paper strip, which as generally known is composed of two layers ice of paper, in the present case a black paper layer and ya colo-red paper layer commonly used as a light 'and wet protecting paper strip for roll films. The upper side of the sealing band is green colored and the underside is black.-

The extremities of the sealing band are provided with the rectangular openings 2 and 3, on which, at the green colored side, the self-adhesive rectangular strips 4 and 5 are attached.

FIG. 2 shows an enlarged longitudinal cross section of the adhesive strip 5 and one extremity of the sealing band 1. The adhesive strip, which normally follows the curving of the paper band and which is overlying the rectangular opening, is represented here in a somewhat impressed position to indicate the way in which the adhering side of the strip is contacting the underlying layer through the open A perspective side view of the sealing band is shown in FIG. 3, in which the opening 3 at one extremity of the sealing band and the adhesive strip 4 at the other extremity of the sealing band can be seen. v

Referring to FIG. 4, the sealing of a substandard film spool 6 is carried out as follows. The extremity 7 of the substandard film, wound on the spool, is somewhat pulled outwardly and attached to one end of the sealing band 1 by pressing the self-adhesive strip 5 through the opening 3 to the film extremity 7, the black part ofthe sealing band thus being turned inwardly. Next, the sealing band is wound on the substandard film spool and gripped at its extremity just before the opening 2. The sealing band is firmly pulled and as its first extremity strongly adheres to the film extremity, the last windings of the substandard film are Well tightened. It has to be noticed that the distance between the centres of the self-adhesive strips on the sealing band is equal to the circumference of the iilm roll. Finally, the sealing band is pulled until its opening 2 faces the adhesive strip 5 and is then pressed thereto. The substandard lilm is now sealed and the windings .will not be loosened, not even when submitted to rough manipulation, for instance during transport.

For unsealing the substandard film one simply proceeds in reverse. As the self-adhesive strip 4 adheres with its adhesive side to the back side of the self-adhesive strip 5, which usually consists of a plastic material such as cellulose, the adhesive layer of the strip 4 will not be damaged in separating both strips, nor a part of the back layer of the strip S, adhering to the adhesive side of the strip 4, will be torn off to cover the adhesive side. The same goes for the self-adhesive strip 5 attached to the lm extremity.

Since the loosening of the sealing band does not involve any damage, it can be used again more than once.

In using a sealing band 1 with self-adhesive strips 4 and S, the width of which is somewhat smaller than the width of the sealing band, there is no risk for the adhering substance of the self-adhesive strips to stick to the interior sides of the spool flanges, when the adhering substance after some time or owing to unfavorable storing conditions would occasionally protrude the edges of the strips.

In FIG. 5 a modified embodiment of the sealing band according to the present invention is shown. The extremity of this sealing band is provided with two cut out parts 10 and 8. Over these cutout parts an adhesive strip 9 is attached. This sealing band is treated in the same way as the one described hereinbefore.

The sealing band according to the present invention is very appropriate to be applied automatically round the film spool during the manufacture process. For this purpose an apparatus can be provided comprising a roll of duplex paper, a roll of self-adhesive tape, a perforating system for making openings in the sealing band close 5 to its extremities and a cutting system for periodically cutting the continuously fed duplex paper and the discontinucusly fed self-adhesive tape, further periodically movable pressure rollers for pressing the self-adhesivev tape against the duplex paper band and for pressing the extremities of the sealing band against the extremities of the lm, respectively against lthe other extremity of the Y sealing band.V

As to the described sealing bands one is not limitedto the use of duplex 'paper band. Instead thereof plastic tapes or ,tapes consisting of paper and plastic, such as described in the British patent specification No. 849,165

' may be used.

Finally the sealing bands for film spools can still be manufactured indifferent colors', for indicating the type of film', eg. a photographic black/white or color film, f

Finally,-the sealing band according to the present ini vention may be provided at its exterior side with an easily Writefonlayer or surface onto which the person using this sealing band, can mention identifying data, the sensitivity of the film, the illumination conditions of the dark room for treating the iilm spool and other indications. Y

I claim: `1. A band for sealing a Wound roll of flexible material comprising:

(a) a band, thewidth of said band being at least equal to the width of the Vflexible material, (b) at least one aperture adjacent each end of said band, the aggregate Width of said apertures being at least half the width of said band,

(c) a pair of strips having a self-adhesive surface, said surface attached to the same side of said band, the width of said strips vbeing less than the width of said band, j Y

i (d) said strips positionedover said apertures with a portion of said self-adhesive surface attaching said strips to said band, and a portion of said self-adhesive surface covering the aperture,

(e) said strips beingspaced ya predetermined distance from one another on said band substantially equal to the circumference of said wound roll providing `overlapping of the ends of said band and corresponding strips after Winding said band around said roll of iiexible material,

(f) the self-adhesive surface of one of'said strips being attached to the outer surface of said roll of flexible material, Y

(g) the self-adhesive surface of the other of said strips being attached to said one of said strips.

2. YA sealing band according to claim 1 wherein said apertures have a rectangular shape.

3. A sealingV band according to claim 1 wherein said apertures are in the form of recesses along the edge of said band.

4. A sealing band accordingto claim 1 wherein said self-adhesive strip has a non-adhesive back side.

References Cited by the Examiner UNITED STATES PATENTS THERON E. CoNDoN, Primary Examiner.

EARLE J. DRUMMOND, Examiner. 

1. A BAND FOR SEALING A WOUND ROLL OF FLEXIBLE MATERIAL COMPRISING: (A) A BAND, THE WIDTH OF SAID BAND BEING AT LEAST EQUAL TO THE WIDTH OF THE FLEXIBLE MATERIAL, (B) AT LEAST ONE APERTURE ADJACENT EACH END OF SAID BAND, THE AGGREGATE WIDTH OF SAID APERTURES BEING AT LEAST HALF THE WIDTH OF SAID BAND, (C) A PAIR OF STRIPS HAVING A SELF-ADHESIVE SURFACES, SAID SURFACE ATTACHED TO THE SAME SIDE OF SAID BAND, THE WIDTH OF SAID STRIPS BEING LESS THAN THE WIDTH OF SAID BAND, (D) SAID STRIPS POSITIONED OVER SAID APERTURES WITH A PORTION OF SAID SELF-ADHESIVE SURFACE ATTACHING SAID STRIPS TO SAID BAND, AND A PORTION OF SAID SELF-ADHESIVE SURFACE COVERING THE APERTURE, (E) SAID STRIPS BEING SPACED A PREDETERMINED DISTANCE FROM ONE ANOTHER ON SAID BAND SUBSTANTIALLY EQUAL TO THE CIRCUMFERENCE OF SAID WOUND ROLL PROVIDING OVERLAPPING OF THE ENDS OF SAID BAND AND CORRESPONDING STRIPS AFTER WINDING SAID BAND AROUND SAID ROLL OF FLEXIBLE MATERIAL, (F) THE SELF-ADHESIVE SURFACE OF ONE OF SAID STRIPS BEING ATTACHED TO THE OUTER SURFACE OF SAID ROLL OF FLEXIBLE MATERIAL, (G) THE SELF-ADHESIVE SURFACE OF TE OTHER OF SAID STRIPS BEING ATTACHED TO SAID ONE OF SAID STRIPS. 